Portable electric utility lamp



June 1 1, 1929- F. H. BUssMNN ET AL 1,716,516

PORTABLE-ELETRIC UTILITY LAMP l .Filed Oct. 25, 1924 F/. J mm1/705.5

Patented June 11, 1929;.

ait sr FRANK n. Bussi/mun, ALoYsrUs B., BUssMnNN, AND HENRY T. BUssMANN, or

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Application filed Gctober 9,5, 1924. Serial No. 745,849.

' Our invention relatesto electric lamps and -invention tothe precise form, construction or arrangement of parts shown or the several lparts thereof, inasmuch as variousalterations may be made Without changing the scope of our invention.

In the drawings,v Fig. 1 is a View, partially in section, of .a preferred form of our invention; Fig. 2 is a bottom view of Fig. 1 and Fig. 3 is an enlargedview of a preferred form of adjustable. joint between the socket` and the base. Fig. 4 is a transverse sectional elevation of thevshade holder.

Referring to the drawings, 5 shows a subbase to which is attached a threaded stud 7.` The base of the lamp is preferably comprised of the part 8 and the plate 9.' To this plate 9 is attached a nut 10 Which engages the stud 7 This provides a very simple effective clamping mechanism Which has a further advantage in that the sub-base clamping member can be fiXedly adjusted before positioning the lamp.

To prevent the clamping arrangement from injuring inishedsurfacemwe preferably attach to the sub-baseV a paper, `felt or other similar materialv as shown at 12 and cause the portion 13 of the plate 9 to project felt, or other similar material as shown at 6 so that the portion 13 cannot touch the surface clamped on. With this arrangement, it is obvious that We have provided a flat surface of substantial dimensions for clamping purposes, so as todivide the clamping presbeing hung on a hook or nail.

16 .shows lampbulb held byk the lain-p socket 17 which is preferably attached to l the supportlS. Thissupport isconnected held the ball socket Q1 Which likewise cont-ams the spring 22..,1The latter serves by the portion 19 toa ballQO. This ball is l by'pressure to hold the ball 2O at any desired setting Without any adjustment except to push it to the desired point. The Washerf prevents excessive friction between lthe spring and the ball. lt Will be'noted that the portion 19 is connected to the ball ata pointoffset from aline runninglthrough the center of thel lamp socket and substantially coinciding with the aXis of the base When the lamp is in an upright position as shown in Fig. l. This arrangement makes it possible to adjust the lamp bulb and lamp socket to a ypoint Where they are practicallyat right angles to the base, and yet, While. in that position, permits them to be swung-around to anypoint in an entire circle and to be held in that position. It will begobvious that this pro-- vides an adjustable joint With a maximum degree of flexibility.

It Will be apparent from the foregoing that We have provided a very simple, substantial l and artistic method of providing Astand lamps With a means for vclamping them on various articles so that light can be obtained by the user inthe most convenient manner, and that We have provided an exceedingly useful and j practical adjustable joint and ,shade that permits of the light being directed exactly` where it is desired with aminimum of effort. j rlhe constructions shown are those We prefer to employ but We do not restrict ourselves to `the precise constructions shown, as it is obvi- 1. In an electric lamp, a lamp socket, Y

support therefor, a ball and socket joint and L a connector betyveensaid support and ball,

ysaid ball and support having their center lines substantially coinciding, and that por-` tion of the connector attached to the'ball be- .j

ing offset With'respect to said centerl lines.

2. Inanv'electricflamp, a base, a support for a lamp socket, said supportl adapted toI be positionedvvitli its center line substantially coincidingV with the axis ofthe base 1 y and means whereby said'support may be the base.

4. In an electric lamp7 a base, a support ior a lamp socket adapted to be positioned withr its center-line substantially coinciding` I with the axis of the base said support being)` `movable lto bring its center lineat substan- Y tially right angles to s ai'd axis and.A means whereby said support `may be rotated aboutA 1 the axis of the base.

` 5. Inan electric lamp, a ball and a ball socket comprising agoint, a lamp socketcarried by one of ysaid elements and a support 'gior the ball socket, said lamp socket beingv adapted to Abe positioned Withits center, line' substantially coinciding with the axis of the support for the ball socket and movable so that the center line of said lamp socket 'may be brought to substantially right angles to the axis of the ball socket and means whereby'said lamp socket may be rotated about` the axis of the support for the ball socket.

6. In an yelectric lamp, a base having a support for .the lamp socket, aVsub-base adapted to permit the lamp to stand thereon' and threaded adjustable 'connect-ing means betweenthe base and the sub-base Y whereby to clamp the lamp on a support.

7. In a portable electric lamp, a base hav-- ing a. support for the lamp socket,v a roetatable sub-base adapted to permit the lamp to stand thereon and connecting` meansl therebetween whereby said sub-basemay be main-V tained in a predetermined adjusted position relative to the base. I

8. In a portable electric lamp, a basevhavv- 'ing a supporty for the lamp socket, a rotat-' able sub-base adapted to permit thelamp to stand thereon,v and means therebetween 'whereby the `base and sub-base may be clamped to a support by rotation of either. 1

'9. In an electric lamp, a base, threads Vcarried by said base, a subbase, a threaded stud permanently attached to saidA sub-base and engaging said threads whereby a clamping action between said base and sub-.base is obtained. y i

FRANK II. BUSSMANN. ALOYSIUS B. BUSSMANN: HENRY BUSSMANN. 

